Slope Stability Analysis And Design Of Anti-Slide Piles

The problem of slope stability relates to the economic development in our country highway, railway, water conservancy and other many fields of engineering, it brings many security problems to engineering construction, influence the construction cost. With the continuous development of social economy, the geological environment is deteriorating, the slope problem has become one of the global geological disaster. Therefore, the slope stability analysis is a worthy of discussion and research problems.The paper focuses on two theoretical methods of slope stability (limit equilibrium method and the finite element strength reduction method), through data and literatures, a preliminary understanding of the main factors affecting the slope stability. In the analysis of slope stability, strength reduction finite element method using the soil stress-strain relationship. Simulation of slope landslide stability loss of the entire process, get the shape of slip surface and the safety factor of the slope, the stress and deformation of the soil can also be everywhere within the value. Compared with the limit equilibrium method, this method has a greater improvement in theory. Its advantage is mainly reflected in:the position and shape of slope sliding don’t preset, using the method of the strength parameters of slope soil materials gradually reduced, the final slope rock mass due to shear capacity is insufficient and lose stability.Through an example the results of the two calculation methods are compared, the results show that the calculation results of two methods have difference but the difference is small, the results can be considered consistent. The respective of two calculation methods can be used in the engineering practice to improve the safety and economy of engineering.The calculation of the sensitivity of the influencing factors of the slope stability. Analysis showed that severe, internal friction angle and cohesion on the slope safety coefficient is larger, lope height, slope Angle from the previous three less effect on the slope stability. In the slope engineering economic efficient design and processing work of slope disasters these calculation results is worth using for reference.Through the slope stability analysis under different rainfall intensity and different rainfall duration, getting the effects of different types of rainfall on seepage field and the safety factor of slope. The calculation results show that:rainfall, especially heavy rainfall intensity, longer duration of rainfall, is the main reason of slope stability and surface deformation. Rainfall caused the water level changes in soil slope, so the seepage pressure is formed, those reduce the safety factor of the slope.As one of the effective measures of anti-slide piles reinforced slope, with safe and easy construction, anti sliding ability and other characteristics, has been widely used in slope engineering. Traditional theory of computation of anti-slide piles have not fully consider the interaction between pile and soil, the slope soil and anti-slide piles are considered separately in calculation, without considering interaction of pile and soil. In this paper, the slope soil and anti-slide piles as a whole to the calculation and analysis, effective simulation of the interaction of soil and pile. The main factors influencing the effect of slope reinforced with piles briefly explained, analyzed the influence of pile length, pile location, pile spacing (horizontal), stiffness of the pile and main material parameters of the soil on the reinforcement effect of anti-slide piles.On the basis of the above research, combined with engineering examples, the safety factor of slope under the action of the anti-slide pile is calculated. Respectively to calculates pile displacement, bending moment and shear force in the single row and double rows.